Labile organic carbon (LOC) plays major role in effecting the microbial activity and further release of green house gases from the soil. Different methods are available to estimate labile organic C of soils, but, no information is available in relating the labile organic C with the distribution of C moieties. The objective of the present study was to relate the labile organic C with the distribution of C moieties in three different wetland ecosystems of the Louisiana coast. Different methods were used to estimate the LOC pool of the soils namely aerobic and anaerobic incubation, water dissolved organic C and acid soluble organic C. This data was compared with the distribution of C moieties in the soil organic matter analyzed using nuclear magnetic resonance technique (NMR). The amount of LOC estimated by anaerobic incubation was highly correlated with the amount of total polysaccharides present in the soil.
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